Do you have a T? Do they know a fair amount about DID? If so, would they be willing to talk to your wife to answer questions?
Having been in a similar situation, getting to ask questions face to face with a professional was WAY better than reading on the internet. If you are limited to internet sources, try to guide her to legit info.
It's a lot to take in at once, but for me, it made my wife's habits make more sense. It is actually possible to end up with a supportive SO after sharing info about DID.
In any case, be safe. Stepping away from a situation is better than hurting someone for all parties involved.